Nut-lock.



No. 810,084. PATBNTED JAN. 16., 1906. H. R. ROMBEBGBR.

NUT LOOK.

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UNITED STATES PATENT oFFIoE Specification of Letters Patent.

Patented Jan. 16, 1906.

Application filed September 21, 1905. Serial No 279,445.

To aJ/Z whom it may concern:

Be it known that I, HARRY R. ROMBERGER, a citizen of the United States, residing at Winona, in the county of Montgomery and State of Mississippi, have invented certain new and useful Improvements in Nut-Locks, of which the following is a specification.

My invention relates to an improved nutlock; and it consists in the constructions, combinations, and arrangements herein 'described and claimed.

An object of my invention is to provide a nut-lock especially adapted for use on the rail-joints of railroad-tracks which will prevent any lost motion due to wear of the parts and will securely lock the nut against displacement.

A further object of iny invention is to provide a durable and inexpensive form of nutlock which can be conveniently applied and removed without danger of distortion and which will positively lock the nut against turning.

In the accompanying drawings, forming a part of this application, and in which similar reference-numerals indicate corresponding parts in the several views, Figure is a perspective view illustrating one embodiment of my invention applied to the fish-plate joint of a railroad-track. Fig. 2 is a detail sectional view, on an enlarged soale, taken on the line 2 2 of Fig. 1. Fig. 3 is a sectional view on the line 3 3 of Fig. 4. Fig. 4 is a perspective showing the front face of my improved nut-lock, and Fig. 5 is a perspective view showing the rear face of my improved nut-lock.

Referring to the drawings, 1 indicates the adjacent ends of two rails joined by the usual 'fish-plates 2, bolts 3, and nuts 4.

My improved washer 5 is shown comprising a strip of resilient metal coiled in a spiral form and having one end projecting beyond the spiral to constitute a Securing extension 6. This extension is bifurcated to provide two oppositely-inclined legs 7, which latter are formed with angular or knife edges 8 for engaging the flange 9 of the fish-plate to positively secure the nut-lock from rotation about its bolt.

As shown in the drawings, the spiral strip is provided with interlocking recesses 10 at the intersection of the spiral coil and the securing extension 6.' These recesses permit the spiral coil to be compressed axially sufiiciently to bring the front faces 11 and 12 of the coil into a common plane, whereby they constitute a spring-seat valong diametrically opposite portions of the nut. This overlapping construction enables the spiral to be constructed of a strip having a width along the axis of the spiral materially greater than its thickness radially of the spiral, thereby constituting a construction which exerts a very strong pressure against the nut to prevent oscillation of the latter through vibrations or lost motion due to wear. The interlooking recesses 10, further, lock the spiral against distortion and unwinding under abnormal strains and insure the maintenance of a powerful spring-seat for the nut.

The end of the spiral strip opposite the extension 6 is extended forward beyond the surface of the spring-seat 11 12 to constitute a spring-dog 13. The dog 13 is provided with an inclined face 14 for engagement by the bottom surface of the nut when the latter is being screwed to its position and with a tapering recess 15 in the inner surface of said inclined face for engaging the side of the nut when the latter has been properly brought against its spring-seat 11 12.

I have described above the preferred form of my improved nut-lock; but obviously changes could be made within the spirit and scope of my invention.

Having thus described my invention, what I I claim as new, and desire to secure by Letters Patent, is-

1. A nut-lock comprising a spiral strip of resilient metal providedv with a Securing extension, said strip being recessed to permit overlapping of the coils of said spiral, substantially as described.

2. A nut-lock comprising a spiral strip of resilient metal provided with a securing extension at one end, said strip being recessed to permit overlapping of the coils of said spiral, substantially as described.

3. A nut-lock comprising a, spiral strip of resilient metal provided with a Securing extension, said strip being recessed to permit overlapping of the coils of said spiral, and a spring-dog carried by said spiral, substantially as described.

4. A nut-lock comprising a spiral strip of resilient metal provided with a Securing extension'projecting beyond said spiral, said strip being recessed at the intersection of said extension with the coil of the spiral to permit overlapping of the coils of said spiral, substantially as described.

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resilient metal adapted to be applied around a bolt between the nut and the part clamped,l

said strip being,` recessed to permit overlappingl of the coils of said spiral, Whereby said coils provide a spring-seat against diametric-V ally opposite portions of the nut, and a springdog extending from the spiral above the plane of such spring-seat, sub stantially as described.

In testimony Whereof I afliX my signature in presence of tWo Witnesses.

HARRY R. ROlVIBERGER.

Witnesses:

T. I. WI-IITEHEAD, I. N. LoWRiMoRE. 

